Attorney volunteers shelter and digital security (4,10)

I believe the answer is:

data protection

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'attorney volunteers shelter' is the definition.
I can't tell whether this definition defines the answer.

'digital security' is the wordplay.
'digital' becomes 'data' (I can't explain this - if you can you should give a lot more credence to this answer).
'security' becomes 'protection' (synonyms).
'data'+'protection'='DATA PROTECTION'

'and' is the link.

Can you help me to learn more?

(Other definitions for data protection that I've seen before include "safeguarding essential details" , "Privacy issue" .)

I've seen this clue in The Daily Express.

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